<template>
  <div>
    <!-- 顶部面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片式图区域 -->
    <el-card>
      <!-- 警告信息 -->
      <el-alert show-icon title="添加商品信息！" type="info" center></el-alert>
      <!-- 进度条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 表单验证区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- tab栏区域 -->
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          @tab-click="tabClicked"
          :before-leave="beforeTabLeave"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cascaderProp"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="(item) in manyTabData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb, i) in item.attr_vals" :key="i" :label="cb" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :on-success="onSuccess"
              :headers="headerObj"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="addBtn" @click="addGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewDialogVisible" width="50%">
      <img class="previewImg" :src="previewPath" />
    </el-dialog>
  </div>
</template>
<script>
// 导入深拷贝插件
import _ from 'lodash'
export default {
  data() {
    return {
      // 当前被选中的tab标签
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 选择的商品分类id数组
        goods_cat: [],
        // 上传的商品图片临时路径
        pics: [],
        // 商品信息
        goods_introduce: '',
        // 商品的参数（数组），包含 `动态参数` 和 `静态属性`
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      cateList: [],
      cascaderProp: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表
      manyTabData: [],
      // 静态属性列表
      onlyTabData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: { Authorization: window.sessionStorage.getItem('token') },
      previewDialogVisible: false,
      previewPath: ''
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('请求商品分类数据失败! ')
      }
      console.log(res.data)
      this.cateList = res.data
    },
    // 监听商品分类的选择
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return
      }
      console.log(this.addForm.goods_cat)
    },
    // tab标签离开前的校验
    beforeTabLeave(activeName, oldNmae) {
      if (oldNmae === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类! ')
        return false
      }
    },
    // 点击tab标签 切换
    async tabClicked() {
      // 请求商品参数
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('请求商品分类数据失败! ')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        })
        console.log(res.data)
        this.manyTabData = res.data
      } else if (this.activeIndex === '2') {
        // 请求商品静态属性
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('请求商品分类数据失败! ')
        }
        console.log(res.data)
        this.onlyTabData = res.data
      }
    },
    // 监听图片上传成功后的事件
    onSuccess(response) {
      const picObj = { pic: response.data.tmp_path }
      this.addForm.pics.push(picObj)
      console.log(this.addForm)
    },
    // 监听图片预览事件
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    // 监听删除上传图片的事件
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(item => item.pic === filePath)
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 点击添加商品按钮 添加商品
    addGoods() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请先完善商品信息')
        if (
          this.addForm.goods_price === 0 ||
          this.addForm.goods_weight === 0 ||
          this.addForm.goods_number === 0
        ) {
          return this.$message.error('商品价格/重量/数量不能为0！')
        }
        // 在提交商品信息前 对商品参数做处理
        // 深拷贝一份信息
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 拼接出 动态参数 和 静态属性 的数组 attrs
        this.manyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)

        const { data: res } = await this.$http.post('goods', form)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功! ')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.addBtn {
  margin-top: 15px;
}
</style>
